package emails;


import javax.mail.*;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;
import java.util.Properties;

public class EmailUtil {
    String host;
    String port;
    String user;
    String password;

    Session mailSession = null;

    public EmailUtil(String host, String port, String user, String password) throws MessagingException {
        this.host = host;
        this.port = port;
        this.user = user;
        this.password = password;
        mailSession = this.createSession();
    }

    private Session createSession() throws AddressException, MessagingException {

        // 创建Properties 类用于记录邮箱的一些属性
        Properties props = new Properties();
        // 表示SMTP发送邮件，必须进行身份验证
        props.put("mail.smtp.auth", "true");
        //此处填写SMTP服务器
        props.put("mail.smtp.host", this.host);
        //端口号，QQ邮箱端口587
        props.put("mail.smtp.port", this.port);
        // 此处填写，写信人的账号
        props.put("mail.user", this.user);
        // 此处填写16位STMP口令
        props.put("mail.password", this.password);

        // 构建授权信息，用于进行SMTP进行身份验证
        Authenticator authenticator = new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                // 用户名、密码
                String userName = props.getProperty("mail.user");
                String password = props.getProperty("mail.password");
                return new PasswordAuthentication(userName, password);
            }
        };
        // 使用环境属性和授权信息，创建邮件会话
        Session mailSession = Session.getInstance(props, authenticator);
        return mailSession;
    }

    public void send(String toEmail, String title, String content) throws MessagingException {
        // 创建邮件消息
        MimeMessage message = new MimeMessage(mailSession);
        // 设置发件人
        InternetAddress form = new InternetAddress(user);
        message.setFrom(form);
        // 设置收件人的邮箱
        InternetAddress to = new InternetAddress(toEmail);
        message.setRecipient(RecipientType.TO, to);
        // 设置邮件标题
        message.setSubject(title);
        // 设置邮件的内容体
        message.setContent(content, "text/html;charset=UTF-8");
        // 最后当然就是发送邮件啦
        Transport.send(message);

    }

    public static void main(String[] args) throws MessagingException {
        EmailUtil emailUtil = new EmailUtil("smtp.qq.com","587","245393886@qq.com","umbzerkmyofacacg");
        emailUtil.send("15218612811@163.com","测试邮箱发送","测试邮箱发送");
    }
}

